Django的通过ID

Question

休息嵌套串行验证我有以下Django的休息串行：

class FileSerializer(serializers.ModelSerializer): 
    class Meta: 
     model = FileModel 
     fields = ('id', '_file') 

class SomeSerializer(serializers.ModelSerializer): 
    files = FileSerializer(many=True, required= False) 
    class Meta: 
     model = SomeModel 
     fields = ('id', 'files') 

和模型

class File(models.Model): 
     some_obj = models.ForeignKey('SomeObj',related_name='files', blank=True, null=True) 
     _file = models.FileField(upload_to=get_file_path) 

问题来了，当我创建SomeSerializer与现有的文件对象

s = SomeSerializer(data = {'files': [{'id' : 1}]}) 
s.is_valid() 
s.errors 

返回

False 
{'_file': [u'No file was submitted.']} 

如何解决这个问题？谢谢。

Answer 1

那么，这个消息是非常明显的。您不提供“_file”给序列化程序。这应该可以解决：

s = SomeSerializer(data = {'files': [{'id' : 1, '_file': <somedata>}]}) 

Answer 2

_file场丢失，那么如果不是必需的，但设置required到False：

class FileSerializer(serializers.ModelSerializer): 
    _file = serializer.FileField(required=False) 

    class Meta: 
     model = FileModel 
     fields = ('id', '_file')